Swiss prosecutors have opened a criminal investigation into Sepp Blatter, the outgoing head of the world soccer body FIFA, on suspicion of criminal mismanagement and misappropriation, the Attorney-General's office said. Mr. Blatter was interrogated after a meeting of FIFA's executive committee in Zurich and authorities carried out a search at the body's headquarters Friday. US and Swiss authorities announced in May they were investigating corruption at the highest levels of the world's most popular sport, including in the awarding of the 2018 and 2022 world cups to Russia and Qatar respectively.At least 14 soccer officials and Sports Marketing Executives were indicted at that time, but until Friday authorities had not pointed the finger at Blatter, the 79-year-old Swiss who has been running FIFA since 1998.